An Introduction to C# and .NET Framework Recursive Method Call ( A method can call itself. Access Specifier Return type Method name Parameter List Method body ) Recursive Arrays Inheritance C++ logic polymorphism

1. An Introduction to C#
and
the .NET Framework
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2. Recursive Method Call
 A method can call itself.
 Access Specifier
 Return type
 Method name
 Parameter List
 Method body

4. Recursive

5. Arrays
 An array stores a fixed-size sequential collection of
elements of the same type.
 Declaring Arrays
 datatype[] arrayName;

6. Arrays Program

7. Isn’t?

8. Array program

9. Inheritance
 One of the most important concepts
 Inheritance allows us to define a class
in terms of another class
 makes it easier to create and maintain
an application
 Base and Derived Classes

10. Example

11. C++ logic
In C we had to code our own bugs. In C++ we can inherit them.

12. C# - Polymorphism
 The word polymorphism means
having many forms
 'one interface, multiple functions'.
 Static (In static polymorphism, the
response to a function is determined
at the compile time)
 Dynamic(In dynamic polymorphism,
it is decided at run-time.)

13. Static Polymorphism
 C# provides two techniques to implement static
polymorphism.
Function overloading
Operator overloading
 Function Overloading
 You can have multiple definitions for the same function name in the
same scope

14. Example function overloading

15. Dynamic Polymorphism
 C# allows you to create abstract classes that are used to
provide partial class implementation of an interface
 Abstract classes contain abstract methods
 The derived classes have more specialized functionality.
 rules about abstract classes
 You cannot create an instance of an abstract class
 You cannot declare an abstract method outside an abstract
class
 When a class is declared sealed, it cannot be inherited,
abstract classes cannot be declared sealed.

16. Example

17. Polymorphism Fact
 A dog, a spider, and a human can all walk at a rate of
speed. Everyone knows this. But, when talking about the
specifics of how they walk, each implementation is
different. A spider has 8 legs and will 'scurry' around very
quickly ( relative ). A dog has 4 legs and will leap and
jump and run around. A human has 2 legs and will place
one in front of the other, enabling them to walk.